the suspect is an ex-lapd officer. he is now the center of a massive manhunt in southern california. we have live pictures from the crime scene right now. cbs reporter susan mcginnis with the online manifesto that targets the suspect's former colleagues. >> reporter: police helicopters are flying over the communities of riverside and corona an hour's drive from los angeles. three police officers were shot early today. one died. investigators say the suspect is a former alameda officer and navy reservists named christopher dorner who posted an online manifesto threatening police officials and their families. >> his whereabouts are unknown. and we are asking for the public's help in finding him. we have strong cause to believe dorner is armed and dangerous. >> reporter: dorner is also suspected of shooting and killing a college basketball coach and her fiance in a parking garage sunday night. the father of the coach, monica quan, represented dorner in front of a disciplinary board when dorner was dismissed from the lapd